The objective of this report is to develop and test methodologies for computing energy losses at junction manholes. Laboratory data obtained over a 6-year period at the Federal Highway Administration's (FHWA's) Hydraulics Laboratory are analyzed within the framework of three methodologies: the energy grade line, power loss, and neural networks. Descriptions of the methods are presented, along with a statistical analysis comparing the accuracy with which each method computes observed depth in the junction manhole. Volume I provides an overview of the hydraulic conditions at junction manholes and identifies the need to supplement existing data for development of predictive equations for computing energy losses. Also discussed are prior research results, three analytical methods for determining junction losses, and the experimental configurations in the laboratory. This report also provides a detailed analysis and performance comparison of each of the three methodologies analyzed. Guidance is given as to which methodology may be most appropriate in computing the energy losses through a pipe system. Volume II documents the physical and hydraulic data collected for each of the 739 laboratory experiments performed.

  • Supplemental Notes:
    • See also Volume I: Research Report and Design Guide, FHWA-RD-94-080 (TRIS 670372).
  • Corporate Authors:

    GKY & Associates, Incorporated

    5411-E Backlick Road
    Springfield, VA  United States  22151

    Federal Highway Administration

    Turner-Fairbank Highway Research Center, 6300 Georgetown Pike
    McLean, VA  United States  22101
  • Authors:
    • Chang, F M
    • Kilgore, R T
    • Woo, D C
    • Mistichelli, M P
  • Publication Date: 1994-11


  • English

Media Info

  • Pagination: 766 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00675296
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-94-081, 3D3C1
  • Contract Numbers: DTFH61-88-C-00004, DTFH61-92-C-00094
  • Files: TRIS, USDOT
  • Created Date: Mar 17 1995 12:00AM